yet 与already在现在完成时的用法 already和yet一定用在现在完成时中吗？如果不是，那么...
\u5728\u73b0\u5728\u5b8c\u6210\u65f6\u4e2d ever never just already yet\u5728\u7528\u6cd5\u548c\u610f\u601d\u4e0a\u6709\u4ec0\u4e48\u533a\u522b\uff1f\u73b0\u5728\u5b8c\u6210\u65f6\u8868\u793a\u8fc7\u53bb\u53d1\u751f\u6216\u5b8c\u6210\u7684\u67d0\u4e00\u52a8\u4f5c\u5bf9\u73b0\u5728\u9020\u6210\u7684\u5f71\u54cd\u6216\u7ed3\u679c\u3002\u5982\uff1a
Have you read that story\uff1f\u4f60\u8bfb\u8fc7\u90a3\u4e2a\u6545\u4e8b\u5417\uff1f\uff08\u201c\u8bfb\u201d\u8fd9\u4e00\u52a8\u4f5c\u53d1\u751f\u5728\u8fc7\u53bb\uff0c\u5bf9\u73b0\u5728\u9020\u6210\u7684\u5f71\u54cd\u662f\uff1a\u662f\u5426\u77e5\u9053\u6545\u4e8b\u7684\u5185\u5bb9\u3002\uff09
I have bought two apples\uff0e \u6211\u4e70\u4e86\u4e24\u4e2a\u82f9\u679c\u3002 \uff08\u201c\u4e70\u201d\u8fd9\u4e00\u52a8\u4f5c\u53d1\u751f\u5728\u8fc7\u53bb\uff0c\u5bf9\u73b0\u5728\u9020\u6210\u7684\u7ed3\u679c\u662f\uff1a\u62e5\u6709\u4e24\u4e2a\u82f9\u679c\u3002\uff09
\u5728\u5b66\u4e60\u8fd9\u4e00\u6982\u5ff5\u7684\u540c\u65f6\uff0c\u8fd8\u5e94\u6ce8\u610f\u5e38\u4e0e\u73b0\u5728\u5b8c\u6210\u65f6\u8fde\u7528\u7684\u51e0\u4e2a\u526f\u8bcd\uff1aalready\uff0cjust\uff0cever\uff0cyet\uff0cnever\u7b49\u3002already\uff0cjust\u591a\u7528\u4e8e\u80af\u5b9a\u53e5\u4e2d\uff0cever\uff0cyet\uff0cnever\u591a\u7528\u4e8e\u7591\u95ee\u53e5\u548c\u5426\u5b9a\u53e5\u4e2d\u3002\u5982\uff1a
I have already finished my homework\uff0e\u6211\u5df2\u7ecf\u505a\u5b8c\u5bb6\u5ead\u4f5c\u4e1a\u4e86\u3002
He has just had his meal\uff0e\u4ed6\u521a\u5403\u8fc7\u996d\u3002
Have you ever sung this English song\uff1f\u4f60\u66fe\u5531\u8fc7\u8fd9\u9996\u82f1\u6587\u6b4c\u5417\uff1f
They haven't started yet\uff0e\u4ed6\u4eec\u8fd8\u6ca1\u6709\u52a8\u8eab\u3002
We have never heard of it\uff0e\u6211\u4eec\u4ece\u6765\u6ca1\u6709\u542c\u8bf4\u8fc7\u8fd9\u4ef6\u4e8b\u3002
\u73b0\u5728\u5b8c\u6210\u65f6\u8868\u793a\u8fc7\u53bb\u7684\u52a8\u4f5c\u5bf9\u73b0\u5728\u9020\u6210\u7684\u5f71\u54cd\uff1b\u4e00\u822c\u8fc7\u53bb\u65f6\u8868\u793a\u52a8\u4f5c\u53d1\u751f\u7684\u65f6\u95f4\u5728\u8fc7\u53bb\u3002\u8bd5\u6bd4\u8f83\uff1a
The plane has arrived . \u98de\u673a\u5df2\u7ecf\u6765\u4e86\u3002\uff08\u8bf4\u660e\u73b0\u5728\u7684\u60c5\u51b5\uff1a\u98de\u673a\u5728\u8fd9\u513f\u3002\uff09
The plane arrived a quarter of an hour ago. \u98de\u673a\u662f\u4e00\u523b\u949f\u4ee5\u524d\u62b5\u8fbe\u7684\u3002\uff08\u5f3a\u8c03\u52a8\u4f5c\u53d1\u751f\u7684\u65f6\u95f4\u5728\u8fc7\u53bb\u3002\uff09
have been in, have been to \u4e0ehave gone to \u7684\u7528\u6cd5
1. have(has) been in \u610f\u4e3a\u201c\u5df2\u7ecf\u5728\u67d0\u5730\u5446\u4e86\u591a\u957f\u65f6\u95f4\u201d\uff0c\u5e38\u4e0e\u8868\u793a\u4e00\u6bb5\u65f6\u95f4\u7684\u72b6\u8bed\u8fde\u7528\u3002\u5982\uff1a
Mr. Brown has been in Shanghai for three days. \u5e03\u6717\u5148\u751f\u6765\u4e0a\u6d77\u5df2\u7ecf\u6709\u4e09\u5929\u4e86\u3002
They have been in Canada for five years. \u4ed6\u4eec\u5230\u52a0\u62ff\u5927\u6709\u4e94\u5e74\u4e86\u3002
2. have(has) been to\u610f\u4e3a\u201c\u66fe\u7ecf\u53bb\u8fc7\u67d0\u5730\u201d\uff0c\u8868\u793a\u73b0\u5728\u5df2\u7ecf\u4e0d\u5728\u90a3\u91cc\u4e86\u3002\u53ef\u4e0ejust, ever, never\u7b49\u8fde\u7528\u3002\u5982\uff1a
I've just been to the post office. \u6211\u521a\u624d\u53bb\u90ae\u5c40\u4e86\u3002
Have you ever been to Hangzhou? \u4f60\u66fe\u7ecf\u53bb\u8fc7\u676d\u5dde\u5417\uff1f
Mary has never been to the Great Wall. \u739b\u4e3d\u4ece\u672a\u53bb\u8fc7\u957f\u57ce\u3002
3. have(has) been to \u540e\u9762\u53ef\u63a5\u6b21\u6570\uff0c\u8868\u793a\u53bb\u8fc7\u67d0\u5730\u51e0\u6b21\u3002\u5982\uff1a
I've been to Beijing three times. \u6211\u53bb\u8fc7\u5317\u4eac\u4e09\u6b21\u3002
They have been to that village several times. \u4ed6\u4eec\u53bb\u8fc7\u90a3\u4e2a\u6751\u5e84\u597d\u51e0\u6b21\u4e86\u3002
4. have(has) gone to \u610f\u4e3a\u201c\u5230\u67d0\u5730\u53bb\u4e86\u201d\uff0c\u8868\u793a\u5230\u4e86\u67d0\u5730\u6216\u6b63\u5728\u53bb\u67d0\u5730\u7684\u9014\u4e2d\u3002\u603b\u4e4b\uff0c\u8bf4\u8bdd\u65f6\u8be5\u4eba\u4e0d\u5728\u73b0\u573a\uff0c\u4e00\u822c\u4e0d\u7528\u7b2c\u4e00\u3001\u7b2c\u4e8c\u4eba\u79f0\u4ee3\u8bcd\u4f5c\u53e5\u5b50\u7684\u4e3b\u8bed\u3002\u5982\uff1a
\u2014Where is Tom? \u6c64\u59c6\u5728\u54ea\u91cc\uff1f
\u2014He has gone to the bookshop.\u4ed6\u5230\u4e66\u5e97\u53bb\u4e86\u3002
\u73b0\u5728\u5b8c\u6210\u65f6\u8868\u793a\u8fc7\u53bb\u53d1\u751f\u6216\u5b8c\u6210\u7684\u67d0\u4e00\u52a8\u4f5c\u5bf9\u73b0\u5728\u9020\u6210\u7684\u5f71\u54cd\u6216\u7ed3\u679c\u3002\u5982\uff1a
Have you read that story\uff1f\u4f60\u8bfb\u8fc7\u90a3\u4e2a\u6545\u4e8b\u5417\uff1f\uff08\u201c\u8bfb\u201d\u8fd9\u4e00\u52a8\u4f5c\u53d1\u751f\u5728\u8fc7\u53bb\uff0c\u5bf9\u73b0\u5728\u9020\u6210\u7684\u5f71\u54cd\u662f\uff1a\u662f\u5426\u77e5\u9053\u6545\u4e8b\u7684\u5185\u5bb9\u3002\uff09
I have bought two apples\uff0e \u6211\u4e70\u4e86\u4e24\u4e2a\u82f9\u679c\u3002 \uff08\u201c\u4e70\u201d\u8fd9\u4e00\u52a8\u4f5c\u53d1\u751f\u5728\u8fc7\u53bb\uff0c\u5bf9\u73b0\u5728\u9020\u6210\u7684\u7ed3\u679c\u662f\uff1a\u62e5\u6709\u4e24\u4e2a\u82f9\u679c\u3002\uff09
\u5728\u5b66\u4e60\u8fd9\u4e00\u6982\u5ff5\u7684\u540c\u65f6\uff0c\u8fd8\u5e94\u6ce8\u610f\u5e38\u4e0e\u73b0\u5728\u5b8c\u6210\u65f6\u8fde\u7528\u7684\u51e0\u4e2a\u526f\u8bcd\uff1aalready\uff0cjust\uff0cever\uff0cyet\uff0cnever\u7b49\u3002already\uff0cjust\u591a\u7528\u4e8e\u80af\u5b9a\u53e5\u4e2d\uff0cever\uff0cyet\uff0cnever\u591a\u7528\u4e8e\u7591\u95ee\u53e5\u548c\u5426\u5b9a\u53e5\u4e2d\u3002\u5982\uff1a
I have already finished my homework\uff0e\u6211\u5df2\u7ecf\u505a\u5b8c\u5bb6\u5ead\u4f5c\u4e1a\u4e86\u3002
He has just had his meal\uff0e\u4ed6\u521a\u5403\u8fc7\u996d\u3002
Have you ever sung this English song\uff1f\u4f60\u66fe\u5531\u8fc7\u8fd9\u9996\u82f1\u6587\u6b4c\u5417\uff1f
They haven't started yet\uff0e\u4ed6\u4eec\u8fd8\u6ca1\u6709\u52a8\u8eab\u3002
We have never heard of it\uff0e\u6211\u4eec\u4ece\u6765\u6ca1\u6709\u542c\u8bf4\u8fc7\u8fd9\u4ef6\u4e8b\u3002
\u63a5\u89e6\u4e94\uff1a\u73b0\u5728\u5b8c\u6210\u65f6\u4e0e\u4e00\u822c\u8fc7\u53bb\u65f6\u7684\u7528\u6cd5\u6bd4\u8f83
\u73b0\u5728\u5b8c\u6210\u65f6\u8868\u793a\u8fc7\u53bb\u7684\u52a8\u4f5c\u5bf9\u73b0\u5728\u9020\u6210\u7684\u5f71\u54cd\uff1b\u4e00\u822c\u8fc7\u53bb\u65f6\u8868\u793a\u52a8\u4f5c\u53d1\u751f\u7684\u65f6\u95f4\u5728\u8fc7\u53bb\u3002\u8bd5\u6bd4\u8f83\uff1a
The plane has arrived . \u98de\u673a\u5df2\u7ecf\u6765\u4e86\u3002\uff08\u8bf4\u660e\u73b0\u5728\u7684\u60c5\u51b5\uff1a\u98de\u673a\u5728\u8fd9\u513f\u3002\uff09
The plane arrived a quarter of an hour ago. \u98de\u673a\u662f\u4e00\u523b\u949f\u4ee5\u524d\u62b5\u8fbe\u7684\u3002\uff08\u5f3a\u8c03\u52a8\u4f5c\u53d1\u751f\u7684\u65f6\u95f4\u5728\u8fc7\u53bb\u3002\uff09
\u63a5\u89e6\u516d\uff1ahave been in, have been to \u4e0ehave gone to \u7684\u7528\u6cd5
1. have(has) been in \u610f\u4e3a\u201c\u5df2\u7ecf\u5728\u67d0\u5730\u5446\u4e86\u591a\u957f\u65f6\u95f4\u201d\uff0c\u5e38\u4e0e\u8868\u793a\u4e00\u6bb5\u65f6\u95f4\u7684\u72b6\u8bed\u8fde\u7528\u3002\u5982\uff1a
Mr. Brown has been in Shanghai for three days. \u5e03\u6717\u5148\u751f\u6765\u4e0a\u6d77\u5df2\u7ecf\u6709\u4e09\u5929\u4e86\u3002
They have been in Canada for five years. \u4ed6\u4eec\u5230\u52a0\u62ff\u5927\u6709\u4e94\u5e74\u4e86\u3002
2. have(has) been to\u610f\u4e3a\u201c\u66fe\u7ecf\u53bb\u8fc7\u67d0\u5730\u201d\uff0c\u8868\u793a\u73b0\u5728\u5df2\u7ecf\u4e0d\u5728\u90a3\u91cc\u4e86\u3002\u53ef\u4e0ejust, ever, never\u7b49\u8fde\u7528\u3002\u5982\uff1a
I've just been to the post office. \u6211\u521a\u624d\u53bb\u90ae\u5c40\u4e86\u3002
Have you ever been to Hangzhou? \u4f60\u66fe\u7ecf\u53bb\u8fc7\u676d\u5dde\u5417\uff1f
Mary has never been to the Great Wall. \u739b\u4e3d\u4ece\u672a\u53bb\u8fc7\u957f\u57ce\u3002
3. have(has) been to \u540e\u9762\u53ef\u63a5\u6b21\u6570\uff0c\u8868\u793a\u53bb\u8fc7\u67d0\u5730\u51e0\u6b21\u3002\u5982\uff1a
I've been to Beijing three times. \u6211\u53bb\u8fc7\u5317\u4eac\u4e09\u6b21\u3002
They have been to that village several times. \u4ed6\u4eec\u53bb\u8fc7\u90a3\u4e2a\u6751\u5e84\u597d\u51e0\u6b21\u4e86\u3002
4. have(has) gone to \u610f\u4e3a\u201c\u5230\u67d0\u5730\u53bb\u4e86\u201d\uff0c\u8868\u793a\u5230\u4e86\u67d0\u5730\u6216\u6b63\u5728\u53bb\u67d0\u5730\u7684\u9014\u4e2d\u3002\u603b\u4e4b\uff0c\u8bf4\u8bdd\u65f6\u8be5\u4eba\u4e0d\u5728\u73b0\u573a\uff0c\u4e00\u822c\u4e0d\u7528\u7b2c\u4e00\u3001\u7b2c\u4e8c\u4eba\u79f0\u4ee3\u8bcd\u4f5c\u53e5\u5b50\u7684\u4e3b\u8bed\u3002\u5982\uff1a
\u2014Where is Tom? \u6c64\u59c6\u5728\u54ea\u91cc\uff1f
\u2014He has gone to the bookshop.\u4ed6\u5230\u4e66\u5e97\u53bb\u4e86\u3002
yet\u4e00\u822c\u7528\u4e8e\u5426\u5b9a
首先两者都是“已经”的意思yet用于否定句和疑问句中(一般用在句末，但是也有用在句首的情况)
例如：I haven't done my homework,yet.
Have you done your homework yet?
already用于陈述句中（一般用于have/has的后边，动词的前边，但是也有用在句首或者句末的情况）
例如：I have already had breakfast.
I have been too Beijing already.
1.yet
yet常用于疑问句和否定句。在疑问句中，用来询问说话人期望发生的事情是否已经发生。在否定句中，表示说话人期望发生的事情尚未发生。例如：
John, have you finished that report yet? 约翰，你把报告已经写出来了吗？
John hasn't finished that report yet and I asked him for it three days ago. 约翰还没有写完报告，可我三天前就要他交了。
2.already
already表示“已经”，常用于肯定句中。例如：
It's only 11 o'clock and they have already had lunch. 现在才11点，他们已经吃过午饭了。
Are they building a new hotel here? There are too many hotels already. 他们要在这儿建一个新饭店吗？这儿的饭店已经够多了。
yet用于反问和疑问句，already用于陈诉句
U8-2:Have you read Treasure Island yet?知识点2现在完成时的结构与用法（1）（already，yet）
yet 只能放句尾
already哪都 行，
扩展阅读：现在完成时already与yet ... already employed ... yet already 区别 ... yet already just ... already怎么读 ... already和yet用法口诀 ... already变成yet ... already和yet哪个好用 ... already yet例句 ...
